File: classExtendingOptionalChain.types

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=== tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendingOptionalChain.ts ===
namespace A {
>A : typeof A

    export class B {}
>B : B
}

// ok
class C1 extends A?.B {}
>C1 : C1
>A?.B : A.B
>A : typeof A
>B : typeof A.B

// error
class C2 implements A?.B {}
>C2 : C2
>A : typeof A